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[ModuloSchedule] Fix data types in ModuloScheduleExpander::isLoopCarried

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The cycle values in modulo scheduling results can be negative.
The result of ModuloSchedule::getCycle() must be received as an int type.

Patch by Masaki Arai!

Differential Revision: https://reviews.llvm.org/D71122
This commit is contained in:
Thomas Raoux 2019-12-09 07:24:18 -08:00
parent 54c73ec047
commit e196f6f63f
1 changed files with 2 additions and 2 deletions
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4
lib/CodeGen/ModuloSchedule.cpp
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@ -1190,7 +1190,7 @@ void ModuloScheduleExpander::rewriteScheduledInstr(
bool ModuloScheduleExpander::isLoopCarried(MachineInstr &Phi) {
if (!Phi.isPHI())
return false;
unsigned DefCycle = Schedule.getCycle(&Phi);
int DefCycle = Schedule.getCycle(&Phi);
int DefStage = Schedule.getStage(&Phi);
unsigned InitVal = 0;
@ -1199,7 +1199,7 @@ bool ModuloScheduleExpander::isLoopCarried(MachineInstr &Phi) {
MachineInstr *Use = MRI.getVRegDef(LoopVal);
if (!Use || Use->isPHI())
return true;
unsigned LoopCycle = Schedule.getCycle(Use);
int LoopCycle = Schedule.getCycle(Use);
int LoopStage = Schedule.getStage(Use);
return (LoopCycle > DefCycle) || (LoopStage <= DefStage);
}